Photochemical preparation of ZnO nanoparticles |
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| Authors: | Tomáš Gbur Václav Čuba Viliam Múčka Martin Nikl Karel Knížek Milan Pospíšil Ivo Jakubec |
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| Affiliation: | 1.Faculty of Nuclear Sciences and Physical Engineering,Czech Technical University in Prague,Prague 1,Czech Republic;2.Institute of Physics AS CR, v.v.i,Prague 6,Czech Republic;3.Institute of Inorganic Chemistry AS CR, v.v.i,Husinec-?e?,Czech Republic |
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| Abstract: | Preparation of zinc oxide nanoparticles from aqueous solutions containing zinc nitrate or formate using UV irradiation was investigated. Analysis of solid phase formed during irradiation confirmed the presence of zinc oxide or zinc peroxide nanoparticles ranging in size from 1 to 70 nm, depending on initial precursors. Annealing at temperatures 650–1000 °C results in forming of rice-like zinc oxide particles, up to hundreds of nm in size. Photochemical method yields material with high chemical purity and uniform particle size distribution. In addition, photo-induced doping of zinc oxide with lanthanum was studied. Presence of lanthanum in zinc oxide crystal lattice and post-preparation treatment in reduction atmosphere significantly increase the UV excitonic luminescence at 395 nm in radioluminescence spectra. |
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